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Finding the Fourth Proportional to 618.24, 931.65 and 612.72

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Solution

The fourth proportional to 618.24, 931.65 and 612.72 is: 923.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.24 : 931.65 = 612.72 : x
  2. Step 2: Convert to fraction form
    618.24/931.65 = 612.72/x
  3. Step 3: Cross multiply
    618.24x = 931.65 × 612.72
  4. Step 4: Simplify right side
    618.24x = 570,840.59
  5. Step 5: Solve for x
    x = 570,840.59/618.24
  6. Step 6: Final answer
    x = 923.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.